Improvement in rotary engines



c. H. PALMER.

Rotary-Engines.

I/z'ire 6 may: 1

Patented April 28, I874. 1W-

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In yen fanports. Numerals 1 an UNITED ST TES PATENT *OrEroE.

- CHARLES H. PALMER, OF NEW YORK, ASSIGNOR T0 oHARLEs n. DEWEY,

OF BROOKLYN, N. "Y.

IMPROVEMENTIN ROTARY ENGINES.

Specification forming part of Letters Patent No. 150,350, dated April28, 1874 application filed February 5, 1874.

ing the accompanying drawings and letters of reference marked thereon.I, V I

Figure 1, is a front view. Fig. 2 is a sectional view. Fig. 3 is a frontview of the steam-ports. Fig. 4 is a sectional back view of theregulation or exhaust levers. Fig. 5 is a side view of segment-gearings,with intermediate pinion' working therein. Fig. 6 rep-' resents avertical transverse section taken between chambers K and L, hereafterexplained.

a represents the outer casing; b, the central shaft and axis of rotationc a, curved steamcylinders; e e, curved piston-cylinders; f f,

connectiug pistons; g g, regulating or exhaustlevers; h h, segmentalgearings, with interme diate pinion o,- i z, friction-cams; J,steamchamber for inlet, and K- steam-chamber for outlet, of steam; L,inlet of steam, and m outlet of steam; at, steam-valve; O, outer circleof steam-ports; and P inner circle of steam- (i2 represent the inlet andexhaust ports. The circulation of the steam through the various ports isindicated by arrows. All the'parts within the case a revolve with shaftb, in the direction of the arrows. Pinion r revolves upon a bearing thatis fixed in the shaft b, while the segmentgearings h h, in which pinion7' works, are

i fitted on shaft b, so that they .may remain withoutmotion while bis inmotion, or may exceed the forward motion of b when required .to close upthe exhaust-chamber, hereafter conducted across the steam-chamber to theoutlet, (seen in Figs. 2 and 6,) while a, Fig. 6,

are the ports, through which live steam enters cylinders c.

Apawl and ratchet may be used instead of the friction-cams t i, toprevent back action of levers g.

The connecting-pistons, tubular or other wise, are not essential tocontinuous revolution of steam-cylinders, as levers g are alter natelythrown forward toclosefup the err-"- haust, by pinion or operatingthrough segmentgearing .h; but when dispensed with the head of cylinderscshould be closed.

From this description of the construction of this engine it isseenthat,.when steam is admitted between the cylinder-head of c andpiston-cylinder head 6, the friction-cams '5 '5 prevent back action ofpiston-cylinder e in the rear of the steam. Consequently cylinder 0 mustadvance, while piston-cylinder e in the rear remains momentarily atrest; but piston-cylinder e' in front of the cylinder, taking livesteam, is thrown forward twice the distance and double the velocity ofthe cylinder taking live steam, so as to close up the exhaust of theforward cylinder 0. The cause of piston-cylinder 0 moving "twice thedistance, with double the velocityof cylinder 0 in a given time, is aresult of pinion r acting as a short lever from the cente of motion uponthe long levers 9 through segmental gearings h. When either cylinder 0is taking live steam a portion escapes into tubular eonnecting-pistonsf, and thus aids {levers g to close up the exhaust, thenimmediatelhausts backward through the sam the momentthe exhaust incylinder'icnuthe rear is being closed up by lever 9. Cylinders 0 exhaustbackward through the same chanters Patent- 1 1, The curved cylinders 0 cand piston-cylindex-s e e,in combination; 2. Levers g g; cams-i '5,segmental 'g'eai'ings cylinders'e e.

nel they recei i'e stemn until ranching exhausttubes 1:, at which pointand' mo nent ports u am cut 011.

I claim asnew and desire tn'secnre by Leth h, with pinion r,.incombination withpi'stom CHARLES H. P LMER.

Witnesses l I I 1WALTER W. Monmetm, GEO. M. Rm sn

